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Cartridge developed by Norma Precision From Wikipedia, the free encyclopedia
The .300 Norma Magnum, also known as .300 NM or 300 Norma, is a centerfire magnum rifle cartridge developed by Swedish ammunition manufacturer Norma Precision. The .300 Norma Magnum uses a .338 Norma Magnum parent case necked down to .30 caliber,[1] named to differentiate it from the older .308 Norma Magnum designed in 1960, and has begun to gain popularity among long-range shooters. According to the official C.I.P. (French: Commission Internationale Permanente pour l'Epreuve des Armes à Feu Portatives) rulings, the .300 Norma Magnum can handle up to 440.00 MPa (63,817 psi) Pmax piezo pressure.[2]
.300 Norma Magnum | ||||||||
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Type | Rifle | |||||||
Place of origin | Sweden | |||||||
Production history | ||||||||
Designer | Norma | |||||||
Designed | 2012 | |||||||
Specifications | ||||||||
Parent case | .338 Norma Magnum | |||||||
Case type | Rimless, bottleneck | |||||||
Bullet diameter | 7.83 mm (0.308 in) | |||||||
Neck diameter | 8.68 mm (0.342 in) | |||||||
Shoulder diameter | 14.29 mm (0.563 in) | |||||||
Base diameter | 14.87 mm (0.585 in) | |||||||
Rim diameter | 14.93 mm (0.588 in) | |||||||
Rim thickness | 1.52 mm (0.060 in) | |||||||
Case length | 63.30 mm (2.492 in) | |||||||
Overall length | 93.50 mm (3.681 in) | |||||||
Case capacity | 6.75 cm3 (104.2 gr H2O) | |||||||
Rifling twist | 229 mm (1 in 9 in) | |||||||
Primer type | Large rifle magnum | |||||||
Maximum pressure (CIP) | 440.00 MPa (63,817 psi) | |||||||
Ballistic performance | ||||||||
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Source(s): Cartridges of the World, 2012 |
The United States Special Operations Command (USSOCOM) chose the new MK22 Advanced Sniper Rifle, which is chambered in .300 Norma Magnum (designated M1163) as well as .338 Norma Magnum.[3][4][5]
The .300 Norma Magnum chambering is offered in these factory rifles:
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